Screw joint



-4 Aliatentcd Mar. 30, 1926.

UNITED y SpftrATEs PATENT `ori-ucr.; f

PAUL GBOSSET, F LTONA-0lT1-;;ISEN, I i

` Application med 'october 1s, 1924.; serial no. 744,403.

To all 'whomc't may concern:

Be it known that I, vPAUL Gnossn'r, a German citizen, and residing at Altona-Ottensen, Germany, have invented certain new and useful Improvements Ain Screw lJoints (for which I have made application for patent in Germany on yI4`ebruary 13th, 1924, No. 60,684), of which the following is a specilication. v

This invention relates to an in'iprovcment in lscrew-joints of the type in which a flanged conical member is secured Within a correspondingly conical seat of al body by means of a cap nut screwed'over said body and engaging Jove-r the flange of said conical member, said nut having an interior ring screwed therein, by means of which it engages behind said flange so as'to withdraw the conical member from its scat'when loosening said nut.

According. to the invention, I provide, instead of saidinterior `ring screwed in the nut, an annular recess in said nut in Which g a springy split 'ring is so inserted that it 25 f orms an inner annular projection in said nut for the same purpose as sard screwed ring above-mentioned.' The advantage vof,

this improved arrangement, above the known art, is that the parts ofthe jouitv can be very quickly mounted and dismounted,\vhich is not the case with an interior screwed ring in the nut the screwing and unscrevving of which takes a rather long time. 4

The accompanying drawing shows dif. ferent modes of application of the subject matter of the present invention, in central longitudinal sections: Fig. 1 illustrating a drill chuck, Fig. l a separate springy split ring, Fig. 2 said chuck inserted in a lathe spindle, Fig. 3 the arrangement of a cutter on a lathe spindle, Fig. 3a a' modification of the s ringy split ring. v A Re erring to Fig, 1. designates a drill chuck having a conical seat in its front end, in which engages a .correspondingly conical sleeve 2 designed for the reception of a drill therein and flanged at its front end for engagement of the latter by a cap nut 3 screwed over said chuck so as to Aclamp said sleeve in the seat of said chuck, a springy i conical sleeve,

my hand.

vFor forming the rscrew-joint,first the 65 sleeve 2'is inserted in the -cap nut 3, wherelupon the springy split ring. 4 is insertedin front end of a'lathe spindle 6, to which it is` secured by means of a ca nut 3 having a springy split ring 4fL 1n 1ts inner annular recess 5, said split ring bearing against the niderside of the iange'of said conical shaft Fig. 3 shows the arrangement ofa cutter on the flanged conical centre-pin 1b of a lathe spindle, said pin being securedv in the conical seat in the front end of said lathespindle 6 by means of a-cap nut 3" having a. sprmgy split ring 4b (Fig. 3*) in its inner annular recess 5", said split ring bearing again'stpthe underside of the flange of said 'conical centre-pin 1*. The cutter 8 has a comcal seat in its rear end for engagement with the correspondingly conical front end 7 of said centre-pin 12a nut 9 screw-ing ovex` the cap nut 3* and securingsaidv cutter 8 1n place. l

Fig. 3 shows a split ring fitted with a hook a or an eye b at its ends for its being easily inserted in or removed fromfsaid cap nut.

What I claim, is

Thel combination with a flanged conical member, a body having a correspondingly conical seat inV one end for the reception of said conical member therein, and a cap nut screwed over said body and engaging over the flange of said member, said nut having an inner annular recess therein, a springy split ring fitting in said recess so as to form an inner projection in said nut and to bear against the underside of the fla-nge of said ,memben substantially as and for the purpose set forth. v

In testimony whereof I have hereunto .set

.PAUL GEOSSET.

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